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DAROY PORTER. ROTARY SHUTTLE OPERATING MECHANISM.

No. 368,967. Patented Aug. 30, 1887.

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DARCY PORTER, OF CLEVELAND, OHIO, ASSIGNOR TO THE \VHITE SEWING MACHINE COMPANY, OF SAME PLACE.

ROTARY-SHUTTLE-OPERATING- MECHANISM.

SPECIFICATION forming part of Letters Patent No. 368,967, dated August 30, 1887.-

Application filed April 9, 1887. Serial No. 234,268. (No model.)

To all whom, it may concern.-

Be it known that I, DARcY PORTER, of Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Rotary Shuttles for Sewing- Machines; and I do hereby declare the following to bea full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in rotary shuttles for sewing-machines, but more especially in mechanism for advancing the shuttle to separate the heel of the latter from the driver to allow the thread-loop to pass unobstructed between these parts.

My present invention is designed as an llIlprovement on devices for which United States Letters Patent No. 858,750 were granted to me March 1, 1887, and towhich reference is made in this specification.

In the accompanying drawings, Figures 1 and 2 are respectively a front and side elevation, the latter being in section, of the parts of a sewing-machine embodying my invention.

' Fig. 3 is an end elevation of the head of the shuttle driving-shaft, showing the driver attached and showing the steady-pin and arm in position. Fig. 4is a side elevation in section corresponding in'the main with Fig. 2, but showing in section the cam-rings for reciprocating the steady-pin. Fig. 5 is a plan in section, showing more especially a recess in the shuttle for receiving the end of the steady-pin arm. Fig. 6 is a front elevation of the shuttle and driver in position detached. Fig. 7 is a sideelevation, partly in section, showing more especially the steady-pin engaging the shuttle, the rearward position of these two parts being shown in Fig. 2. Fig. 8 is a side elevation of the steady-pin and arm detached. Fig- 9 is an end elevation in section on the line w 00, Fig. 4.

- A represents the shuttle; B, the shuttle-race; B, the race-cap; C, the shuttledriving-shaft, and a the driver. The shuttle, between the point a and heel a, is cut away to receive the driver 0, as shown in Figs. 1 and 6. The shuttle-raceis cutaway on top between the 50 points b and b. The shuttle has a hub, A, on

which is mounted the bobbin D and bobbincase D, all of which, together with the tension device (1 and swinging arm (1, for holding the bobbin-case in place, may be of ordinary construction. The hub A of the shuttle has a 5 5 central bore, a", and a recess, a is made at the periphery of the shuttle, as shown in Fig. 5. The shaft C is journaled in suitable boxes, F, connected with the cloth-plate F, only one of these boxes being shown. The shaft C has an enlarged end or head, C, and has a longitudi nal central bore, in which operates the pin E, the latter having an easy fit, so that it may move easily endwise. The reduced forward end 6 of the part E is adapted to enter the bore a of the shuttle to serve as a steady-pin for the latter. An arm, E, is connected with the pin E, the arm being shaped substantially as shown in Figs. 2, 3, 7, and 8, with the forwardlyprojecting end beveled at e and made to enter the recess a of the shuttle.

The mechanism for reciprocating the pin E and arm E is as follows: The pin E has a laterallyprojecting stud, I, that extends out through a slot, 0, of the shaft, and a small roller, 2', is journaled on the outer end of the the stud. This roller t operates between the two camrings J and J, by means of which the desired reciprocating movement is given to the pin E. The cam-rings are preferably set in a sleeve, K, the latter being secured to the forward box, F. The pin E,during its engagement with the shuttle, steadies the latter and supports and holds it concentric with the race, and the parts are timed so that this support of s 5 the steady-pin comes when it is most needed, when the upward pressure of the shuttle would otherwise be sustained by the points I) and b, which would result in these points being soon worn so as to interfere with the perfect work- 0 ing of the shuttle. During the time-that the thread is passing across the center of the shuttle the pin E and arm E are drawn back, the former into the bore of the shaft C and the latter into a recess of the head C, so that they 9 5 are out of the way of the passing thread. As the forwardly-proj ecting end of the arm E enters the recess a of the shuttle, by reason of the beveled or inclined part 6, the shuttle is advanced a trifle to separate the heel of the shuttle from the driver to allow the threadloop to pass unobstructed between these parts.

\Vhat I claim is I to advance the shuttle by engaging the latter,

substantially as set forth.

In testimony whereof I sign this specifica- In a sewing-machine, the combination, with tion, in the presence of two witnesses, this 15th 5 a driving-shaft having a reciprocating steadyday of March, 1887.

pin located therein and a revolving shuttle having a recess therein, of an arm attached to the steady-pin, the end of the arm being adapted to enter the recess of the shuttle, said arm 10 having a beveled or inclined surface adapted DARCY PORTER.

Witnesses:

CHAS. H. DORER, ALBERT E. LYNCH. 

